All TETRATEC AQUARIUM HEATERS TETRATEC AQUARIUM HEATERS Aqua One AquaNano 40 Nano Glass Thermometer Small 10310£2.82 Aqua One Digital Thermometer 10307£2.39 Aqua One Glass Thermometer£1.99 Aqua One heater protector / guard 10298£8.36 Aqua One Premium Glass Thermometer 15cm 10309£3.34 Aqua One Suction Cup – Glass Heater 25-300 Watts, Aquis 2200/2400 (2/pk) 45112£3.49 Fluval Aquarium Submersible Digital Thermometer 11195£8.25 Fluval Aquarium Wireless 2-in-1 Digital Thermometer 11193£9.96 Tetratec Aquarium Heater/Stat 100watt 100-150Ltrs£15.75 Tetratec Aquarium Heater/Stat 150watt 150-225Ltrs£16.50